Means for storing and projecting film transparencies



-Feb.16, 1943.` c. LANGBERG f 2,311,056

MEANS FOR STORING AND4 PROJECTING FILM TRANSPARENCIES Filed'uarch e, 1941 :s sheets-sheet 1 DDUUU Feb; 1s, '1943. LANGBERG MEANS FOR STORING AND v-PROJECTING FILM TRANSPARENCIES Filed March 6, `1941 SSIhee'tS-fSheet 2 Feb. 16, 1943. A Q LANGBERG- 5 2,311,056

MEANS FOR STORING AND PRJECTING FILM TRANSPAKBENGIES Filed March 6, 1941 3 SheetS-She'et 3 v INVENTOR. ,CHARLES LANGBFAG.

@Ww @maf ATTORNEYS Patented Feb. 16, 1943 MEANS FOR STORING AND PROJECTING FILM TRANSPARENCIES Charles Langberg, New York, N. Y. Application March 6, 1941,V Serial No. 381,991

4 Claims.

The present invention relates to means for storing film transparencies, and particularly to such storage means adapted to use in the proj ector disclosed herein so that the transparencies may be projected without removing them from the storage means.

The use of color film has recently become very widespread and since such film when developed and printed results in a film transparency, the practice of projecting light through such transparencies in order t-o produce a magnified image has likewise become widespread.

One of the drawbacks to even wider use of such film color transparencies has been due to the fact that there has been no convenient means for storing the transparencies, and likewise no means for projecting them which did not require the use of a separate slide for each transparency. y

A number of storage means has been developed,

as for example the Filmdex, but these means The complete disc may then be stored in any convenient manner, as for example in a ring binder or in an envelope album of the type used for the storage of phonograph records. Due to the familiarity of the public with phonograph records, the mode of handling these record discs is well known. Y

In order to project the transparencies stored upon a single disc sequentially, I have devised a projector comprising a spindle on whichthe disc may be mounted, together With an optical system arranged to project light through transparencies mounted near the periphery of the disc. It will be seen that by this arrangement the various individual transparencies may be projected by simply rotating the disc upon a spindle to the desired position. Moreover, the discs are readily changed and equally readily stored, as indicated above.

It is an object of my invention to provide storage disc or slide record for lm transparencies, so` constructed that the transparencies may be readily inserted in the disc structure.

It is another object of my invention to-provide such a storage disc which may be bound, together with a number of such discs, in a ring binder or may be stored in an envelope album.

It is a further object of the invention to provide such a disc having a central opening therein adapted to t over the spindle of a projection machine whereby the disc may be rotated to bring the individual transparencies thereof into register with the optical system of a projector.

It is a still further object of my invention to provide a projector for film transparencies having a vertical spindle upon which a lm storage disc may rotate, and having in addition an optical system such that the projected image will be in a plane perpendicular to the plane of the disc. It is a still further object of my inventionv to provide such a projector with means whereby the disc may be readily positioned` upon the spindle. n y

It is a further object of my invention to provide means forl illuminating the transparency carrying disc so that the identifying material thereon may be read while the disc is in position on the projector. Y Y

Other objects and features of my invention will be apparent when the following specification is considered in connection" with the appended drawings, in which Figure 1 isaperspective View of one form of projector for use with the transparency carrying disc or slide record.

Figure 2 is a cross-sectional view of the' projector of Figure 1 showing' in fullv lines the positions of the parts as they would appear during projection and in dotted linesvthe positions of the parts as they would appear during the-insertion or removalof a slide record.

Figure 3 is a cross-'sectional view of a second form of projector for the same purposes as that of Figures 1 andY 2. This 4gure shows the parts in the positions: which they occupy during projection. Y

Figure 4 is a vieW similar to that of Figure 3 but showing the parts in the position which they would occupy during the insertion or removal of a slide record. This view further shows the operation of a mirror device to cause the illumination of the central portion of the record which may carry identifying material thereon.

Figure 5 is a top plan view of the projector of Figures 3 and 4.

Figure 6 is a detailed sectional View showing the mode of assembly' of the mechanism forlowering and raising the lamp housing. yThis gure is taken in the plane of the line 6-6 of-Figure 3.

Figure 7 isf a vertical 4cross-sectional view-of another form of projector differing from that of Figures 3 and 4 primarily in that the aXis of the lamp housing is parallel rather than perpendicular to the axis of the projection lens barrel.

Figure 8 is a plan View of a portion of one form of disc or slide record showing mounted film transparencies in place in pockets of the disc.

Figure 8a is a fragmentary perspective view of the disc of Figure 8 with the film and lrn mount removed from a pocket of the disc.

Figure 8b is a fragmentary sectional view of a disc such as that of Figure 8, but moul-ded rather than formed of a plurality of sheets.

Figure 9 is a fragmentary sectional view taken on the plane of the line 9--9 of Figure 8 showing the construction of the disc of Figure 8.

Figure 10 is a plan view showing'an individual mount for a single film transparency.

Figure 11 is a cross-sectional vieW of an individual nlm mount taken on the plane of the line II-II of Figure 10.

Figure 12 illustrates a film transparency of the type which is positioned in the pockets of Figure 8.

Figure 13 illustrates avportion of another form of transparency carrying disc in which the nlm transparencies are inserted between' the main portion of the disc and flapsl formed thereon near the periphery thereof.

Fig. 14 is a fragmentary sectional View' of the disc of Figure 13 taken onthe plane of the line III-I4 and showing one flap of the upper disc raised preparatory to inserting a film transparency; and

Figure 15 shows a ring binder'with a plurality of slide reco-rds or discs in place therein.

Referring particularly to Figures 1 and 2, there is shown therein one form of projector which may be utilized in connection with the film transparency disc or slide record above mentioned. This projector comprises a base I0, circular in form and having a rectangular projection at one side thereof, on which is carried a housing il, the sides of which are perforated as at 35 in order that heat generated by the equipment mounted in the interior thereof may be dissipated. The base I is supported in any suitable marmer, as for example by the rubber feet I2.

Mounted within the rectangular portion of the housing II is a light source I3, this light source being shown as an incandescent lamp mounted in a socket I4 which is attached in any suitable manner to the housing II. Mounted on the-base ID beneath lamp I3 is a reector I5 which serves todirect the light rays upwardly and through the condensing lenses I6 and I'I, which lenses are mounted in int'urned portionsY I8 of the top of the housing II in any suitable manner.

Likewise mounted on -base I0, within the housing I I, is a transformer which is connected by the leads 2| to terminals 22 which may be in turn connected to any' suitable source of power. The secondary winding of the transformer 28 is connected by leads 23to the lamp socket I4 to cause energization of the lamp In order that the'light vfrom lamp I3 may not pass into the forward portion of the housing, and thence to the exterior thereof through perforations 36, a baffle plate 24 is provided, this plate being mounted on the base I and extending vertically between the cylindrical portion and the rectangular portion of thehousing II. Since the slide recordmust be of a certain size, it' will be seen that no space .is wasted by supplying the transformer. At the center cylindrical portion of the housing there is provided a spindle 25 which is fixed to the top wall of the housing I I in any suitable manner. A disc or slide record is shown in position on the spindle 25.

Hinged to the end wall of the rectangular portion of housing I i is a housing 25 having within it a mirror 2`I suitably supported from the walls of the housing by means of brackets 28. The housing `26 is open at its bottomso that light rays which emanate from the lamp I3 and reiiecto'r I5 will, after passing through the condensing lenses I6 and E'I, impinge upon the mirror 2'1. Also, the housing is perforated at 37 to permit heat to be dissipated. Suitably mounted in the housing 26, in front of the mirror 2l (that is, to the left as seen in Figure 2), is a lens barrel 3i). The lens barrel 30 has a depending portion 3I terminating in an annular ring 32 adapted to fit over the spindle 25. Mounted within the lens barrel 3D is a lens tube 33 carrying the usual compound projection lenses 34 and 35,

It is, of course, intended that a slide record or film disc be mounted on the spindle 25 and be of such dimensions that the transparencies will I be immediately over the condensing lenses I5 and Il. Thus light emanating from the lamp I3 will be condensed and centered by the lenses I5 and II, transmitted through the transparencies, reflected at right angles by the mirror 2'I, and projected through the lenses 34 and 35 upon any suitable screen, the image being focused upon the screen by properly adjusting the position of lens tube 33 within the lens barrel 3e. It will be noted that with this arrangement the major portion of heat generated is produced in the transformer, and therefore the portion of the equipment which must be handled is relatively cool.

Due to the hinged mount of the housing 26, as above mentioned, the insertion and removal of slide records or lm discs is extremely easily performed. Obviously in order to insert or remove a disc it is only necessary that the upper housing 26, together with the lens barrel 38, be rotated about the hinge to the position shown in `dotted lines in Figure 2, whereupon a disc may be'either inserted or removed.

In Figures 3 through 6 there isshown another form of projector, generally similar to that already described, but utilizing a light source operating at the supply voltage and therefore not requiring a transformer. This form of projector comprises a base 40 having a horizontally extending portion 4I with suitable felt or rubber feet 42 thereon, and a vertically extending portion 43. Mounted upon .the base 4I is a lower housing 44 at one side of which there is formed a lens barrel 45 in which the lens tube 45 is slidably adjustable. Likewise mounted within the housing 44 and at 45 degrees to the axis of the lens tube 4t, is a mirror 47, which mirror may be supported in any suitable manner. On the top of the housing 44 there is mounted a spindle 48 adapted to cooperate with the central .hole of a slide record, such as that shown at D.

Mounted above the mirror 4'! in a manner hereinafter to be described, is a lamp housing 53, this housing being generally cylindrical in shape and carrying at its lower end, mounted in a common form of lens mount, a pair of condensing lenses 5I and E2. Also within the housing 59 is a lamp socket 53 in which a lamp 54 is positioned. Above the lamp 54 there is provided a reilector 55, this reflector being supported at the end of a cylindrical member 55 through which the power supply wiresy for the lamp 54 extend. Above the lamp 54 are Ventilating holes 48 4to permit dissipation of heat generated by the'lamp.

An opening is cut in the Wall of the housing 26 at the front thereof, that is', to the left as shown in Figure 3. Hinged to the upper portion of this opening, at 51, is a door 58 which carries a mirror 60. 'I'he purpose of this arrangement is to provide a means whereby light from the lamp 54 may be cast upon the central portion of the disc or record so that the identifying material on this central area of the disc may be visible, and so that the changing of slid-e records is more easily accomplished.

The housing 50 is mounted upon the vertically extending portion 43 of the base 40 in such a manner that itmay be'raised and lowered, In the lower position the housingis positioned for projection while in the upper portion the house ing is in position to facilitate the insertion and removal of the film slide record. Fixed to the housing 50 is a rack 6I which is underoutrbeneath the teeth forming a guidewayBZ. On either side of the vertically extending portion 43 of the base 40 is mounted a pair of L- shaped members 63, the ends of which extend into the guideway 6,2 thereby guiding the lamp housing for vertical movement.

Inserted in a slot near the upper end of portion 43 of the base 48 is a gear 64 which is adapted to mesh with the teeth of rack 6|. Gear E4 is mounted upon a shaft 65 which terminates in a knurled knob 68 externally of the member 43, thereby providing a means whereby the housing 58 may be raised and lowered.

Figure '7 shows a slightly modified form of the projector inf-which a pair of mirrors is provided, thereby permitting the lamp housing to be substantially parallel to the lens barrel. In this form there is provided a base 18 suitably supported upon rubber or felt feet or the like, this base carrying upon it a housing 1l similar to housing 44 of Figure y3. yThe housing 1| is joined by a generally rectangular upright portion thereof to a tubularlamp housing 50a. At one end of the perpendicular portion there is a mirror 12, mounted at a 45 degree angle to the axis of this portion, while at the other end there is a similar mirror 12a. The lower portion of housing 1I comprises the lens kbarrel 13 having the lens tube 14 adjustably mounted within it, while the tubular housing a has mounted therein the lamp reflector a and condensing lenses 5Ia and 52a, similar to those mentioned hereinabove. Suitably mounted upon the lens barrel is a spindle 15 on which a disc or slide record D is mounted for rotation in the same manner as has been described above. As indicated in dotted lines, the path of light is from the lamp source through the condensing lens to the upper one of the mirrors 12, and thence through the transparency to the lower one of the two mirrors 12 and through the projection lenses to the screen.

The various projectors described above are particularly designed for and adapted to use with the slide records or storage discs now to be described. In connection with these storage discs or slide records it is recognized that discs of similar type have been disclosed heretofore, but it is pointed out that my discs are extremely economical in manufacture and are so constructed that the amateur photographer may himself insert the transparencies in the storage discs, as will be pointed out hereinafter.

One form of slide record is shown in Figure 8.

In -this` form a plurality of pockets are provided about. the periphery of a disc, these pockets being adapted to receive slides or transparencies and to retain them so that they may be conveniently stored. When it is desired to project the slides the disc may be removed from storage and placed upon the spindle of any one of the projectors hereinbefore described, and thereafter rotated to position any one of the slides in projecting position.

The slide record of Figure 8 is composed of cardboard or similar material. As shown it comprises two discs, the lower one of which 88 has openings therein as shownat 8l in Figures 8A, while the upper one 82 has larger openings, as shown at 83 in Figure 8A. In someinstances it 'may be preferable to mould the pockets in cardboard or plastic material, as shown in Figure 8B. Both discs, or the single moulded disc, have or has a small central opening in which an eyelet vor the like 84 is placed, this eyelet serving as a bearing for rotation of the disc upon the spindle of a projector. The two discs 80 and 82 are fastened together by cement or in any other convenient manner, thereby forming a slide record comprising, as indicated above, a disc having pockets therein for reception of slides which are pressed into place and retained in the pockets. The slides themselves may be made in any manner, as for example in the manner in which they are now supplied to users of Eastman KodachromeV film, the only difference being that the slides instead of being square, will have the shape of the opening 88 of the upper disc 82.v

Further, as shown particularly in Figures 10, 11 and 12, the transparency such as is shown in Figure 12 may be cut on the dotted lines of that ligure, and then placed in position in the pocket ofthe disc of Figure 8, after which the cardboard mount shown in Figure l1 may be pressed into place in the pocket, thereby holding the transparency in position. Of course, if desired, the cardboard mount of Figures 10y and 11 may be cemented into, place in its pocket, or the transparency may be cemented to the mount 88,

and the mount thereafter pressed into the pocket. It will be understood that the mounts 86 of Figures 10 and 11 are of such size that they must be pressed into their pockets and that for this reason they are retained tightly therein. Further it would be understood that the transparencies may be fastened to the mount 86 in any other manner, such as by stapling, and that the mounts may be fastened in their pockets if desired by stapling, or any other fastening means.

Another form of slide record or disc is that illustrated in Figure 13. In this instance the upper one of the two cardboard discs 82 is provided with a scored line 81 and with cuts 88 which extend radially from the scored line to the periphery of the disc. By this means flaps are provided, as shown particularly in Figure 14, these flaps being adapted to receive a film transparency such as that of Figure 12, the transparency being placed between the lower disc and the flap of upper disc 82. The transparency may be cemented or otherwise fastened to the disc prior to positioning the flap against the lower disc 80, or may merely lie between the disc and flap, after which the flap may be stapled to the lower dise or cemented thereto, or fastened in any suitable manner.

Whether the disc is of the form of Figure 8 or of Figure 13, it may be provided with eyelets 80, as indicated in Figure 8, sothat the disc may be linserted in a ring binder, such as that shown. in Figure 15, thereby providingconvenient means forvstoring a group of such. slide records. If desirable, the slide records may be stored in an album of the envelope type, such as is commonly used for phonograph records.

While I have shown preferred embodiments of my invention, and have described my improved projector and my improved slides as utilized together, I Wish it understood that many other formsv of projector and of slide may be utilized without departing from the scope of my invention, and that my projector may be used with other slides and my slides with other projectors, likewise Without departing from the scope of my invention. I therefore do not wish to be limited by the above description, but on the contrary desire that the scope of my invention be determined solely by the appended claims.

What is claimedis:

1. In a slide projection device, in combination, a lower housing having therein an adjustably mounted projection lens system and a mirror, said lower housing having a spindle thereon, an upper housing having therein a light source and a condensing lens system, means for raising and lowering said upper housing whereby slide carrying discs may be placed upon and removed from said spindle with slides carried thereby positioned in the path of light from said light source intermediate said condensing lens system ancl said mirror, and a door in said upper housing adjacent said light source, said door having a mirror on the inner surface thereof adapted when said door is open to reect light from said light source upon said spindle andthe central portion of said slide carrying disc. v

2. In a projection device adapted for operation with slide records, in combination, a lower housing, a transformer, a light source, a reflector and condensing lenses mounted in said lower housing, an upper housing hinged to said lower housing and having a mirror placed therein in the path of light from said light source and condensing lenses, said mirror being mounted at an angle of 45 degrees with respect to the direction of said light rays, a projection lens system mounted in said upper housing in the path of light rays from said mirror, a spindle on said lower housing adapted to receive a slide record in position such that the slides thereon lie in the path of light from said condensing lens to said mirror, and an annular ring carried by said upper housing and adapted when said upper housing is in normal position to retain said slide record in position upon said spindle.

3. A slide record of the class described comprising, a first disc having spaced apertures along the periphery thereof, a second disc having a plurality of peripheral' iiaps formed thereon, said flaps being equal in Anumber to said apertures, each said flap having an aperture substantially centrally located therein, said apertures of said flaps coinciding when said iiaps lie against said first disc with the apertures in said rst disc, both said iirstV and second discs having a central opening therein and an eyelet or the like extending through said central openings and forming a bearing surface for the rotation of said composite disc structure.

4. A slide record of the class described comprising, in combination, a disc of cardboard or the like having polygonal apertures spaced along the periphery therof, a second disc of the same diameter as the rst disc, said second disc having a score line along chords of a circle of lesser than its full diameter, said chords being equal in number to the apertures in said first mentioned disc, said rst and second discs having their central areas fastened together, radial cuts extending from the intersections of said chords to the periphery of said second disc forming flaps bendable on said score line, an aperture in each said ap coinciding with an aperture in said disc when said aps are positioned against said rst disc, said construction being adapted to receive a ilm transparency between a peripheral portion of the disc and the cooperating flap and to be retained in place by said i'lap in position such that light may pass through said aligned apertures and said iilm transparency.

CHARLES LANGBERG. 

